Bird feeder



FIG. 1 is a front elevational view of a bird feeder showing my new design, the rear being substantially a mirror image of the front shown;

FIG. 2 is a right side elevational view thereof, the left side being substantially a mirror image of the right side shown;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a bird feeder, substantially as shown and described. 